Cane sling



Sept. 10, 1935. c. H. FIELD 2,014,201

CANE SLING "H g. Filed Jan. 26, 1935 2 Sheets-Sheet l Inventor C. H. FIELD CANESLING Sept. 10, 1935.

Filed Jan. 26, 1955 2 Sheets-Sheet 2 M Inventor Patented Sept. 10, 195::

UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to new and useful improvements in hoist line equipment and more particularly to a cane sling.

The principal object of the present invention is to provide a sling whereby the chain has its end portion which is normally above the loop formed of the chain, of stronger construction than the portion of the chain forming the loop, to the end that the weight capacity of a sling can be increased Without increasing the strength of the portion of the sling chain normally forming the loop.

Another object of importance is to provide a chain sling wherein a chain fastening device is employed which will efiectively hold the chain against shifting.

Another object is to provide a device of this character which can be easily assembled when parts are received from different sources, and wherein repairs and replacements can be easily made.

Still another object of the invention is to provide means which will automatically look a chain in snug position around a bundle of cane.

A further object of the invention is to provide a yoke, carrying means which when the load is released will not allow the yoke to slip down on the chain.

Still a further object is to provide means for easily adjusting the length of a chain for lifting loads of varying sizes.

Other objects reside in the provision of a device of the character described which will be light in construction, easily manipulated and of low cost to manufacture.

In the drawings:-

Figure 1 represents a fragmentary side elevational view of the sling showing the yoke in longitudinal section.

Fig. 2 represents a detailed sectional view through the yoke with parts removed.

Fig. 3 represents an inside elevational view of one of the yoke sides.

Fig. 4 represents an inside elevational view of the yoke side complementary to the side shown in Fig. 3.

Fig. 5 represents a longitudinal sectional view through the latch member.

Fig. 6 represents a longitudinal sectional view through the hook member.

Fig. '7 represents a longitudinal sectional view through the yoke assembly.

Fig. 8 represents a longitudinal sectional view through the hook stop.

Fig. 9 represents a side elevational view of the hook supporting pin.

Fig. 10 represents a side elevational view of one of the pivot pins.

Fig. 11 represents a side elevational view of 5 the roller supporting bolt.

Fig. 12 represents a plan View of one of the reinforced links.

Fig. 13 represents a side elevational view of one of the bushings. 10

Fig. 14 represents an end elevational view of the bushing shown in Fig. 13.

Fig. 15 represents a side elevational view of a bearing pin which may be substituted for the pivot members shown in the assembly. 15

Fig. 16 represents a plan view of the grab link ring.

Fig. 17 represents a side elevational view of one of the springs shown in Fig. '7.

Fig. 18 is a diagrammatic view disclosing the 20 weak and strong sections of the chain.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral 5 generally refers to the yoke which forms part of this novel sling construction. Nu- 5 meral 8 generally refers to the sling chain. Numeral l is the swingable hook with which engages the grab link ring 8 constructed in the manner shown in Fig. 16, (or a ring 8' as shown in Fig. 1). The opposite end of the chain is provided 30 with a ring 9 which engages the derrick line, not shown, in the drawings.

Numeral IE represents the swingable stop member for the hook I and numeral H represents an abutment for this stop Ill. The hook I is provided with a shank l2 and as is clearly apparent in Fig. 1, the stop 10 normally assumes a position Within thepath of the hook shank I 2 so that the hook I is normally maintained in the position shown in Fig. 1.

Referring back to the chain, it is to be noted that the same is constructed of two distinct sections, the section a, being constructed of links of normal strength such as are now employed in cane slings .and the section b which is constructed of reinforced links. A link of the construction used in the section b is shown in Fig. 12 and it will be observed that, the ends of this link are enlarged in cross section, at their ends but not increased any in cross section at their side portions. As it is well known that the tensile strength of steel is greater than its resistance to bending and shearing stresses, the cross section of the side portions of the links need not be strengthened.

This section b of the chain, which is of course attached to the section a will be of suflicient length so that its lower end will not be above the yoke 5 when an excessive load is being carried, and when the lower end of the section b is above the yoke, the loop which is then entirely formed of the section a is capable of taking care of the load as the load must necessarily be small to come within the confines of such a restricted loop.

Thus, the reinforced section b of the chain is capable of supporting the entire load which is distributed in the loop between the side portions thereof. A conventional or ordinary chain may be used in this improved sling.

Numeral I3 represents a latch mounted within the yoke, the same being provided with a corrugated foot portion !4 which can be engaged by the hand in actuating the latch. This latch is provided with a toe member l5 at its hub l6 and a protuberance i l at its outer end portion.

At the upper end of the yoke is located .a circumferentially grooved roller I8 in the groove of which can ride the links of the chain section b.

In describing the details of construction associated with the foregoing major parts, it will be observed, that the hook I, the swingable stop I E], the latch 63 and the roller l8 are provided with wear resisting bushings l9. Extending through the bushing IQ of the hook I is the pin 26 which has reduced pintles 2| at its ends journalled through the lower end portions of the side plates 22-22 of the yoke 5. Extending through the side members 22 and crossing the interior of the yoke are the pins 23, each having a sleeve 24 thereon, and on these sleeves the stop member i and latch I3 are swingable.

As is clearly shown in Fig. 7, a well 25 in one of the side plates 22 surrounds a corresponding end of each of the sleeves 24 and in each of these wells is a coiled spring 26. The springs serve to maintain the stop member l0 urged to the position shown in Fig. l and the latch member l3 urged to the position shown in Fig. 1 so that its protuberance i'i will engage between a pair of predetermined links to retain the loop in a definite form. The ends of the pins 23 opposite from their headed ends are split as at 2! to provide portions which can be bent laterally to prevent displacement of the pins.

Numeral 28 represents a bolt which extends thru the side plates 22-22, through a sleeve separator 33, which is within the roll-er l8 and normally separates the sides of the frame of the yoke. Thus the bolt extends through the sides 22-22 and through the roller l8 to retain the roller in normal position. This bolt is threaded through one of the side plates 22 and has a cotter pin 29 for preventing displacement thereof.

The pin shown in Fig. 15 and denoted by numeral 30 can be employed in substitution of the pin 20 or 23, or of the bolt 28 as desired. Removing said bolt will permit the removal of said ro1ler with its sleeve separator 33 and allow a chain to be laid in the yoke between the two sides 2222, when the roller and the sleeve separator may be restored and secured in normal operating position on said bolt.

It can now be seen that with a load of cane placed on the Sling chain and the ring 8 engaged with the hook I, a pull on the chain by the derrick line will tighten up the loop around the load and even though this load is again lowered onto the ground, there is no likelihood of the loop slackening because of the presence of the protuberance I! on the latch l3 projecting in between a pair of links of the chain section b.

When it is desired that the load be released,

a rod can be inserted into the socket 32 of the stop member l0 and by swinging the socket end away from the abutment II, the opposite end of the stop will be removed from the path of the hook shank I2 so that the weight of the load will pull the ring off of the hook.

In conventional slings, when the load is released, the yoke assembly will slide down the chain. However, in the present construction, as the yoke begins to slip on the chain, the toe l5 will engage against an underlying link of the chain, and thus hold the yoke against slipping on the chain.

While the toe I5 is shown on the hub I6 of the latch IS, the same can be placed in the form of a boss or protuberance on one of the side plates 35 22, and perform equally as efiicient. When used in a sling, a chain may be used comprising links made as shown in Fig. 12 and the two sections a and b may be of the same or different strengths, or only the I) need be made of links as shown in Fig. 12.

While the foregoing specification sets forth the invention in specific terms it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described my invention, what I claim as new is:

In a sling, a trip, a chain having one end attached to the trip and its opposite end portion extending through the trip, the normal loop forming portion of the chain below the trip being of average strength construction, the portion of the chain normally operative above the trip being of reinforced construction and substantially stronger than the loop forming portion.

CHARLES H. FIELD. 

